Though it’s not 100% necessary, having read And Then There Were None by Agatha Christie made me appreciate this thriller much more. It’s not a total rip off of the inspiration, but there’s clearly a huge influence. I was kept guessing throughout, which was enjoyable. The high tide closing them in on the island was an interesting motif, and framing the story through a fictional editor’s perspective is a very fun Nabokovian element. However, I disliked how our narrator was constantly stopping the story to pepper in aphorisms. I get that her character had a heart condition and her mother stopped her from fully participating in most activities, so she spent her life on the outside looking in. But putting a platitude in every other sentence got real old, real quick.